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High efficiency solar powered fans

Inactive Publication Date: 2010-12-14
UNIV OF CENT FLORIDA RES FOUND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0015]The first objective of the subject invention is to provide efficient roof / attic exhaust fans, blades, devices, apparatus and methods of operating the fans, that have optimized twisted nonmetal blades for maximizing removal of air from spaces underneath roofs.

Problems solved by technology

Additionally, most fans use planar shaped blades to move airflow which limits the amount of airflow that is moved at any given time.
This buildup of hot air can lead to poor cooling conditions within the building and increased utility costs to run air conditioning systems and cooling systems, and the like.
Existing attic ventilation fans have been used but have substantial power requirements from existing building electrical supplies.
Flat type blades are not designed to maximize moving of air.
However, none of the cited references, individually or in combination overcome all the problems with the prior art described above.
However, the air conditioner condenser fans are not optimized for the ventilation and removal of air from underneath roofs and from attic spaces.
None of these propellers are designed for optimizing airflow to remove undesirable air from attics and from underneath roofs.
Similar to the problems presented above, small portable fans do not have blades aerodynamically optimized for airflow.
In addition, portable fans have batteries that have limited lifespans since the batteries either need to be constantly recharged from a 120 volt power supply or the batteries need to be constantly replaced.
Natural disasters such as hurricanes and earthquakes have caused extensive power outages that can last from several hours to weeks or more in the United States.
Conventional battery powered fans, cannot be used effectively during these disaster conditions.
The prior art listed above does not fix the problems with portable fan use.

Method used

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Examples

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embodiment 200

[0170]FIG. 6 is a perspective exterior view of a roof alcove exhaust embodiment 200 incorporating the fan 1 and blades 10, 20, 30 of the preceding figures with a solar power source 100. FIG. 7 is a view of the separate components of FIG. 6.

[0171]Referring to FIGS. 6-7, the novel fan 1 can be mounted with blades 10-30 facing to exhaust sideways in a housing 240 inside of an opening 225 in a gable side wall 220 below a roof 210. The outer hood 230 with louvers 235 can cover the opening 225 in the gable side wall 220. The fan motor 50 can draw power through cable / power line 55 from a rooftop mounted solar power source 100, which can include two PV (photovoltaic) panels 110, 120 in a frame 130 that can be directly attached (by screws, and the like) into the roof 210. An optional stand 140 can be used to elevate the solar panels 110, 120 and frame 130 above the roof 210. Additional power can be provided by another solar power source 150.

Roof Top Exhaust

[0172]FIG. 8 is another perspective...

embodiment 400

[0188]FIG. 10 is a perspective front view of a portable fan 400 incorporating the fan 1 and blades 10, 20, 30 of the preceding figures with a solar power source 470. FIG. 11 is a rear view of the portable fan 400 of FIG. 10. The portable fan embodiment 400 combines a high efficiency fan 1 in a cylindrical housing 410 with a portable stand that can consist of a telescopingly height adjustable pole 420 with triangular shaped base 430 having wheels 440. The triangular shaped base 430 can have a rear generally straight edge 432 with wheels 440 mounted at each end, angled sides 434, 436 meeting at a rounded apex 438. The shape of the base 430 allows the fan 400 to be easily tilted back in the direction of arrow B so that a user can move the fan 400 with only two wheels 440 by gripping the handle 450 that is attached to the upper pole 420 of the portable fan 400.

[0189]A handtruck type stand 480 having an L-shape with wheels 485 on the lower end and hand rails 482 can support solar power p...

embodiment 500

[0197]Referring to FIGS. 12-19, the portable embodiment 500 can include the combination of a battery powered fan assembly 510 with a portable solar panel assembly 520. The portable solar panel assembly 520 can include a carrying case having a generally rectangular configuration with a handle 600 and having a solar panel 570 that can mounted to an inside of a thin depth rectangular box 575. The bottom edges of the rear box 575 can be attached to a solar panel cover 580 with a cover hinge pin(s) 690. The cover 580 can have angled side edges 582, 588 with an open end portion 585, where the side edges can wrap about the outer side walls 572, 578 of the rear box 575.

[0198]Across the back of the carrying panel assembly 520 can be horizontal support bar 574, that has a support stand 590 attached thereto. Attached to the support bar 574 can be cylindrical tabs 591, 599, with inwardly angled ends 592, 598 pivotally attached thereto. There are two vertical side legs 594, 596 that extend downw...

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PUM

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Abstract

Highly efficient solar fans used in portable and built in configurations. A ventilation fan can be used for exhausting air out from underneath roofs, and / or for being portable in use and application. The fan can include optimized airflow blades having a twisted configuration that can move at a rotational speed operation of up to approximately 500 rpm. The approximately 15 inch diameter twisted blades can be premolded on a hub that together form a single molded unit of plastic. They can also be fabricated using metal. The unit can be mounted in an exhaust outlet having a conical diffuser on or adjacent to a roof. Another embodiment allows for portable solar powered fans used anywhere there is a need for ventilation and moving of air. The blades can rotate by a solar powered motor, where the blades and motor can generate up to approximately 1040 cfm while using no more than approximately 16 Watts. Portable fans can be powered by solar panels. One embodiment has solar panels mounted to a handtruck. Another embodiment has solar panels in a carrying case with a handle having leg(s) which can bend downward to different angled positions. The solar panel carrying case and the fan can each have single handles that allows for the portable fan assembly to carried and transported by both hands of a single user.

Description

[0001]This invention is a Continuation-In-Part of U.S. patent application Ser. No. 11 / 433,888 filed May 12, 2006, now issued as U.S. Pat. No. 7,507,151.FIELD OF INVENTION[0002]This invention relates to solar powered fans, and in particular to apparatus, devices, systems and methods of using optimized twisted blades as efficient attic exhaust fans and portable fans which are also solar powered and the portable fan modular components which are also easily carriable by users and include carrying cases with handles and fold down legs, and to methods of operating, using, housing and transporting the novel fans.BACKGROUND AND PRIOR ART[0003]Fans have been used over the years in semi-permanent mounts for ventilation of buildings, as well as in smaller configurations which allow the fan housings to be moved place to place. These types of fans traditionally require power supplies where power to the fan motors is derived through existing wiring in the buildings and / or through wall mounted pow...

Claims

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Application Information

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IPC IPC(8): F24F7/007H02N6/00
CPCF04D25/0606F24F7/025Y10S454/90Y02B10/24F24F2005/0064Y02B10/20Y02A30/272
Inventor PARKER, DANNYHIBBS, BART
Owner UNIV OF CENT FLORIDA RES FOUND INC
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